"If you don't put gas in a car, it's not going to run," says Puhn, a couples mediator with a law degree from Harvard. "The same is true for a marriage."

Between four and eight couples are in each group, and interact with one another and the instructor via video chat. If you don't feel like airing your dirty laundry, that's fine. The format is more of a class, less of a therapy session, explains Puhn.

And don't worry: people from all over the country take the course, so you're not likely to run into a neighbor.

Keep in mind it's not for couples with addiction problems, or those in abusive relationships, adds Puhn.

But even married couples who don't fight much but are stuck in a rut — hey, if you're not talking to each other, that counts as a rut — can benefit from the program, she says. Learn more at FightLessLoveMore.com.